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This document is the Intellectual Property of SGS AXYS Analytical Services Ltd. and contains Proprietary and Confidential Business <br />Information. It may not be reproduced or distributed without written permission of the owner. © SGS AXYS Analytical Services Ltd, 2020. <br />SGS AXYS Analytical Services Ltd, 2045 Mills Road W., Sidney, BC, Canada, V8L 5X2. Tel. (250) 655-5800, fax (250) 655-5811. <br />This is not a controlled document; it is subject to change without notification. <br /> <br />SGS AXYS Analytical Services Ltd. <br /> <br />MSU-110 Rev 14, 28-May-2020 Summary of MLA-110 Rev 02 Ver 07 Page 3 of 23 <br />SGS AXYS confidential, not to be distributed without written permission <br />Perfluorooctane sulfonamidoacetic acids <br />N-Methylperfluoro-1-octanesulfonamidoacetic acid (N-MeFOSAA, N-Methylperfluoro-1- <br />octanesulfonamidoacetate) <br />N-Ethylperfluoro-1-octanesulfonamidoacetic acid (N-EtFOSAA, N-Ethylperfluoro-1- <br />octanesulfonamidoacetate) <br />Perfluorooctane sulfonamidoethanols <br />N-Methylperfluoro-1-octanesulfonamidoethanol (N-MeFOSE) <br />N-Ethylperfluoro-1-octanesulfonamidoethanol (N-EtFOSE) <br />Ether carboxylates <br />2,3,3,3-Tetrafluoro-2-(1,1,2,2,3,3,3-heptafluoropropoxy)propionic acid (HFPO-DA, 2,3,3,3-Tetrafluoro- <br />2-(1,1,2,2,3,3,3-heptafluoropropoxy)propionoate) <br />Decafluoro-3H-4,8-dioxanonoate (ADONA, DONA, Decafluoro-3H-4,8-dioxanonoic acid) <br />Ether sulfonates <br />9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS, 9-chlorohexadecafluoro-3- <br />oxanonane-1-sulfonate) <br />11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS, 11-chloroeicosafluoro-3- <br />oxaundecane-1-sulfonate) <br />1 PFOSA also called FOSA <br /> <br />The carboxylic and sulfonic acid analyte concentrations can be reported as either the acid or the anion <br />forms. The anion and corresponding acid forms and their CAS Registry Numbers are shown in Appendix A <br />of this summary. <br />1.0 EXTRACTION AND CLEANUP PROCEDURES <br />Aqueous samples size may be up to 1000 mL for aqueous samples analyzed by this method, and <br />up to 0.75 mL for extracts/solvents. Samples are stored in HDPE (high density polyethylene) <br />containers. All samples are spiked with surrogate standards. Aqueous samples are extracted by <br />solid phase extraction (SPE) using weak anion exchange cartridges; wash and elution procedures <br />are chosen to meet various analysis requirements. Sample extracts are then treated with carbon <br />powder, spiked with recovery standards and analyzed by LC-MS/MS. <br />Extract/solvent samples don’t undergo solid phase extraction. The samples are spiked with <br />surrogate and recovery standards, and analyzed by LC-MS/MS. <br />Solid and biosolid sample size may be up to 5 g dry weight for solid samples or up to 5 g wet <br />weight (max. 0.5 g dry weight) for biosolid samples. After addition of isotopically labelled surrogate <br />standards the sample is extracted by shaking three times with methanolic ammonium hydroxide <br />solution, each time collecting the supernatants. The supernatants are combined, treated with ultra <br />pure carbon powder and evaporated to remove methanol. The resulting solution is diluted with <br />water and cleaned up by solid phase extraction (SPE) using disposable cartridges containing a <br />weak anion exchange sorbent. The eluate is spiked with recovery standards and analyzed by LC- <br />MS/MS. <br />www.axysanalytical.com <br />Page 8 of 94